#define DEFAULT_PRINT_FONT_SIZE 12
+// CSS specification offer following guidance on dealing with pixel sizes
+// when printing at
+// http://www.w3.org/TR/2004/CR-CSS21-20040225/syndata.html#length-units:
+//
+// Pixel units are relative to the resolution of the viewing device, i.e.,
+// most often a computer display. If the pixel density of the output
+// device is very different from that of a typical computer display, the
+// user agent should rescale pixel values. It is recommended that the [
+// reference pixel] be the visual angle of one pixel on a device with a
+// pixel density of 96dpi and a distance from the reader of an arm's
+// length. For a nominal arm's length of 28 inches, the visual angle is
+// therefore about 0.0213 degrees.
+//
+// For reading at arm's length, 1px thus corresponds to about 0.26 mm
+// (1/96 inch). When printed on a laser printer, meant for reading at a
+// little less than arm's length (55 cm, 21 inches), 1px is about 0.20 mm.
+// On a 300 dots-per-inch (dpi) printer, that may be rounded up to 3 dots
+// (0.25 mm); on a 600 dpi printer, it can be rounded to 5 dots.
+//
+// See also http://trac.wxwidgets.org/ticket/10942.
+#define TYPICAL_SCREEN_DPI 96.0
+
//--------------------------------------------------------------------------------
// wxHtmlDCRenderer
//--------------------------------------------------------------------------------
-void wxHtmlDCRenderer::SetDC(wxDC *dc, double pixel_scale)
+void wxHtmlDCRenderer::SetDC(wxDC *dc, double pixel_scale, double font_scale)
{
m_DC = dc;
- m_Parser->SetDC(m_DC, pixel_scale);
+ m_Parser->SetDC(m_DC, pixel_scale, font_scale);
}
void wxHtmlDCRenderer::SetSize(int width, int height)
{
+ wxCHECK_RET( width, "width must be non-zero" );
+ wxCHECK_RET( height, "height must be non-zero" );
+
m_Width = width;
m_Height = height;
}
void wxHtmlDCRenderer::SetHtmlText(const wxString& html, const wxString& basepath, bool isdir)
{
- if (m_DC == NULL) return;
+ wxCHECK_RET( m_DC, "SetDC() must be called before SetHtmlText()" );
+ wxCHECK_RET( m_Width, "SetSize() must be called before SetHtmlText()" );
- if (m_Cells != NULL) delete m_Cells;
+ wxDELETE(m_Cells);
m_FS->ChangePathTo(basepath, isdir);
m_Cells = (wxHtmlContainerCell*) m_Parser->Parse(html);
const int *sizes)
{
m_Parser->SetFonts(normal_face, fixed_face, sizes);
- if (m_DC == NULL && m_Cells != NULL)
+
+ if ( m_Cells )
m_Cells->Layout(m_Width);
+ // else: SetHtmlText() not yet called, no need for relayout
}
void wxHtmlDCRenderer::SetStandardFonts(int size,
const wxString& fixed_face)
{
m_Parser->SetStandardFonts(size, normal_face, fixed_face);
- if (m_DC == NULL && m_Cells != NULL)
+
+ if ( m_Cells )
m_Cells->Layout(m_Width);
+ // else: SetHtmlText() not yet called, no need for relayout
}
int wxHtmlDCRenderer::Render(int x, int y,
wxArrayInt& known_pagebreaks,
int from, int dont_render, int to)
{
- int pbreak, hght;
+ wxCHECK_MSG( m_Cells, 0, "SetHtmlText() must be called before Render()" );
+ wxCHECK_MSG( m_DC, 0, "SetDC() must be called before Render()" );
- if (m_Cells == NULL || m_DC == NULL) return 0;
+ int pbreak, hght;
pbreak = (int)(from + m_Height);
while (m_Cells->AdjustPagebreak(&pbreak, known_pagebreaks)) {}
m_DC->SetClippingRegion(x, y, m_Width, hght);
m_Cells->Draw(*m_DC,
x, (y - from),
- y, pbreak + (y /*- from*/),
+ y, y + hght,
rinfo);
m_DC->DestroyClippingRegion();
}
else return GetTotalHeight();
}
+int wxHtmlDCRenderer::GetTotalWidth() const
+{
+ return m_Cells ? m_Cells->GetWidth() : 0;
+}
-int wxHtmlDCRenderer::GetTotalHeight()
+int wxHtmlDCRenderer::GetTotalHeight() const
{
- if (m_Cells) return m_Cells->GetHeight();
- else return 0;
+ return m_Cells ? m_Cells->GetHeight() : 0;
}
m_Filters.Append(filter);
}
+bool
+wxHtmlPrintout::CheckFit(const wxSize& pageArea, const wxSize& docArea) const
+{
+ if ( docArea.x > pageArea.x )
+ {
+ wxMessageDialog
+ dlg
+ (
+ NULL,
+ wxString::Format
+ (
+ _("The document \"%s\" doesn't fit on the page "
+ "horizontally and will be truncated if printed.\n"
+ "\n"
+ "Would you like to proceed with printing it nevertheless?"),
+ GetTitle()
+ ),
+ _("Printing"),
+ wxOK | wxCANCEL | wxCANCEL_DEFAULT | wxICON_QUESTION
+ );
+ dlg.SetExtendedMessage
+ (
+ _("If possible, try changing the layout parameters to "
+ "make the printout more narrow.")
+ );
+ dlg.SetOKLabel(wxID_PRINT);
+
+ if ( dlg.ShowModal() == wxID_CANCEL )
+ return false;
+ }
+
+ return true;
+}
+
void wxHtmlPrintout::OnPreparePrinting()
{
- int pageWidth, pageHeight, mm_w, mm_h, scr_w, scr_h, dc_w, dc_h;
+ int pageWidth, pageHeight, mm_w, mm_h, dc_w, dc_h;
float ppmm_h, ppmm_v;
GetPageSizePixels(&pageWidth, &pageHeight);
int ppiPrinterX, ppiPrinterY;
GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
+ wxUnusedVar(ppiPrinterX);
int ppiScreenX, ppiScreenY;
GetPPIScreen(&ppiScreenX, &ppiScreenY);
+ wxUnusedVar(ppiScreenX);
- wxDisplaySize(&scr_w, &scr_h);
GetDC()->GetSize(&dc_w, &dc_h);
GetDC()->SetUserScale((double)dc_w / (double)pageWidth,
/* prepare headers/footers renderer: */
- m_RendererHdr->SetDC(GetDC(), (double)ppiPrinterY / (double)ppiScreenY);
+ m_RendererHdr->SetDC(GetDC(),
+ (double)ppiPrinterY / TYPICAL_SCREEN_DPI,
+ (double)ppiPrinterY / (double)ppiScreenY);
m_RendererHdr->SetSize((int) (ppmm_h * (mm_w - m_MarginLeft - m_MarginRight)),
(int) (ppmm_v * (mm_h - m_MarginTop - m_MarginBottom)));
if (m_Headers[0] != wxEmptyString)
}
/* prepare main renderer: */
- m_Renderer->SetDC(GetDC(), (double)ppiPrinterY / (double)ppiScreenY);
- m_Renderer->SetSize((int) (ppmm_h * (mm_w - m_MarginLeft - m_MarginRight)),
- (int) (ppmm_v * (mm_h - m_MarginTop - m_MarginBottom) -
- m_FooterHeight - m_HeaderHeight -
- ((m_HeaderHeight == 0) ? 0 : m_MarginSpace * ppmm_v) -
- ((m_FooterHeight == 0) ? 0 : m_MarginSpace * ppmm_v)
- ));
+ m_Renderer->SetDC(GetDC(),
+ (double)ppiPrinterY / TYPICAL_SCREEN_DPI,
+ (double)ppiPrinterY / (double)ppiScreenY);
+
+ const int printAreaW = int(ppmm_h * (mm_w - m_MarginLeft - m_MarginRight));
+ int printAreaH = int(ppmm_v * (mm_h - m_MarginTop - m_MarginBottom));
+ if ( m_HeaderHeight )
+ printAreaH -= int(m_HeaderHeight + m_MarginSpace * ppmm_v);
+ if ( m_FooterHeight )
+ printAreaH -= int(m_FooterHeight + m_MarginSpace * ppmm_v);
+
+ m_Renderer->SetSize(printAreaW, printAreaH);
m_Renderer->SetHtmlText(m_Document, m_BasePath, m_BasePathIsDir);
- CountPages();
+
+ if ( CheckFit(wxSize(printAreaW, printAreaH),
+ wxSize(m_Renderer->GetTotalWidth(),
+ m_Renderer->GetTotalHeight())) )
+ {
+ // do paginate the document
+ CountPages();
+ }
+ //else: if we don't call CountPages() m_PageBreaks remains empty and our
+ // GetPageInfo() will return 0 as max page and so nothing will be
+ // printed
}
bool wxHtmlPrintout::OnBeginDocument(int startPage, int endPage)
{
wxBusyCursor wait;
- int pageWidth, pageHeight, mm_w, mm_h, scr_w, scr_h, dc_w, dc_h;
+ int pageWidth, pageHeight, mm_w, mm_h, dc_w, dc_h;
float ppmm_h, ppmm_v;
GetPageSizePixels(&pageWidth, &pageHeight);
GetPageSizeMM(&mm_w, &mm_h);
ppmm_h = (float)pageWidth / mm_w;
ppmm_v = (float)pageHeight / mm_h;
- wxDisplaySize(&scr_w, &scr_h);
dc->GetSize(&dc_w, &dc_h);
int ppiPrinterX, ppiPrinterY;
dc->SetUserScale((double)dc_w / (double)pageWidth,
(double)dc_h / (double)pageHeight);
- m_Renderer->SetDC(dc, (double)ppiPrinterY / (double)ppiScreenY);
+ m_Renderer->SetDC(dc,
+ (double)ppiPrinterY / TYPICAL_SCREEN_DPI,
+ (double)ppiPrinterY / (double)ppiScreenY);
dc->SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
m_PageBreaks[page-1], false, m_PageBreaks[page]-m_PageBreaks[page-1]);
- m_RendererHdr->SetDC(dc, (double)ppiPrinterY / (double)ppiScreenY);
+ m_RendererHdr->SetDC(dc,
+ (double)ppiPrinterY / TYPICAL_SCREEN_DPI,
+ (double)ppiPrinterY / (double)ppiScreenY);
if (m_Headers[page % 2] != wxEmptyString)
{
m_RendererHdr->SetHtmlText(TranslateHeader(m_Headers[page % 2], page));
projects / wxWidgets.git / blobdiff